
<template>
  <div class="xtx-carousel" @mouseenter="stop" @mouseleave="start">
    <ul class="carousel-body">
      <li
        v-for="(item, i) in sliders"
        :key="i"
        class="carousel-item"
        :class="{ fade: index === i }"
      >
        <RouterLink to="/">
          <img :src="item.imgUrl" alt="" />
        </RouterLink>
      </li>
    </ul>
    <!-- 上一张 -->
    <a @click="toggle(-1)" href="javascript:;" class="carousel-btn prev"
      ><i class="iconfont icon-angle-left"></i
    ></a>
    <!-- 下一张 -->
    <a @click="toggle(1)" href="javascript:;" class="carousel-btn next"
      ><i class="iconfont icon-angle-right"></i
    ></a>
    <div class="carousel-indicator">
      <span
        v-for="(item, i) in sliders"
        :key="i"
        :class="{ active: index === i }"
        @click="index = i"
      ></span>
    </div>
  </div>
</template>

<script>

export default {
  name: 'CarouselView',
  props: {
    sliders: {
      type: Array,
      default: () => []
    },
    duration: {
      type: Number,
      default: 3000
    },
    autoPlay: {
      type: Boolean,
      default: false
    }
  }
  // setup(props) {
  //   // 控制显示图片索引
  //   const index = ref(0);
  //   // 自动轮播逻辑
  //   let timer = null;
  //   const autoPlayFn = () => {
  //     clearInterval(timer);
  //     // 自动播放，每隔多久切换索引
  //     timer = setInterval(() => {
  //       index.value++;
  //       if (index.value >= props.sliders.length) {
  //         index.value = 0;
  //       }
  //     }, props.duration);
  //   };

  //   // 监听sliders数据变化，如果数组有数据且autoPlay是true
  //   watch(
  //     () => props.sliders,
  //     (newVal) => {
  //       if (newVal.length && props.autoPlay) {
  //         autoPlayFn();
  //       }
  //     },
  //     { immediate: true }
  //   );

  //   // 鼠标进入暂停轮播，鼠标离开开启轮播
  //   const stop = () => {
  //     if (timer) clearInterval(timer);
  //   };
  //   const start = () => {
  //     if (props.sliders.length && props.autoPlay) {
  //       autoPlayFn();
  //     }
  //   };

  //   // 点击指示点切换轮播
  //   // 上一张、下一张
  //   const toggle = (step) => {
  //     const newIndex = index.value + step;
  //     if (newIndex > props.sliders.length - 1) {
  //       index.value = 0;
  //       return;
  //     }
  //     if (newIndex < 0) {
  //       index.value = props.sliders.length - 1;
  //       return;
  //     }
  //     index.value = newIndex;
  //   };

  //   // 组件卸载、清除定时器
  //   onUnmounted(() => {
  //     clearInterval(timer);
  //   });
  //   return { index, stop, start, toggle };
  // },
}
</script>
<style scoped lang="less">
.xtx-carousel {
  width: 100%;
  height: 100%;
  min-width: 300px;
  min-height: 150px;
  position: relative;
  .carousel {
    &-body {
      width: 100%;
      height: 100%;
    }
    &-item {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      transition: opacity 0.5s linear;
      &.fade {
        opacity: 1;
        z-index: 1;
      }
      img {
        width: 100%;
        height: 100%;
      }
    }
    &-indicator {
      position: absolute;
      left: 0;
      bottom: 20px;
      z-index: 2;
      width: 100%;
      text-align: center;
      span {
        display: inline-block;
        width: 12px;
        height: 12px;
        background: rgba(0, 0, 0, 0.2);
        border-radius: 50%;
        cursor: pointer;
        ~ span {
          margin-left: 12px;
        }
        &.active {
          background: #fff;
        }
      }
    }
    &-btn {
      width: 44px;
      height: 44px;
      background: rgba(0, 0, 0, 0.2);
      color: #fff;
      border-radius: 50%;
      position: absolute;
      top: 228px;
      z-index: 2;
      text-align: center;
      line-height: 44px;
      opacity: 0;
      transition: all 0.5s;
      &.prev {
        left: 20px;
      }
      &.next {
        right: 20px;
      }
    }
  }
  &:hover {
    .carousel-btn {
      opacity: 1;
    }
  }
}
</style>
